Cross Domain without Flash

Hi everybody,

I have installed and configured my openFire. I can connect on him with Coccinella, or another XMPP client.
But I am testing a connection by a webchat using jsjac :

Without problem if I use the Apache proxy, or a Php proxy.

But when I try without this solutions, the server give a response without content.

I have searched on the Internet a solution, and I have found that I have to put in the response header : Access-Control-Allow-Origin: *

In Apache, we can force to put new informations on the response header, but it is possible in the jetty included in OpenFire ?

Waiting any answer, I wish you a good day,